package com.atguigu.lease.web.admin.custom.interceptor;

import com.atguigu.lease.common.context.LoginUser;
import com.atguigu.lease.common.context.LoginUserContext;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

@Component
public class AuthenticationInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//        获取请求头中的token
        String access_token = request.getHeader("access_token");
//        判断token是否为空
        if (access_token == null) {
//            为空抛出异常
            throw new LeaseException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        } else {
//            不为空解析token
            Claims claims = JwtUtil.parseToken(access_token);
//            获取token中的用户id和用户名
            Long userId = claims.get("userId", Long.class);
            String userName = claims.get("userName", String.class);

//            把用户信息保存到ThreadLocal本地线程对象中
            LoginUserContext.setUser(new LoginUser(userId, userName));
        }
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        LoginUserContext.removeUser();
    }
}